997860662193 has 16 divisors (see below), whose sum is σ = 1364427161856. Its totient is φ = 648384764160.

The previous prime is 997860662159. The next prime is 997860662203. The reversal of 997860662193 is 391266068799.

It is a happy number.

It is not a de Polignac number, because 997860662193 - 2²⁰ = 997859613617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997860662143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14648646 + ... + 14716607.

It is an arithmetic number, because the mean of its divisors is an integer number (85276697616).

Almost surely, 2^997860662193 is an apocalyptic number.

It is an amenable number.

997860662193 is a deficient number, since it is larger than the sum of its proper divisors (366566499663).

997860662193 is a wasteful number, since it uses less digits than its factorization.

997860662193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29365544.

The product of its (nonzero) digits is 52907904, while the sum is 66.

The spelling of 997860662193 in words is "nine hundred ninety-seven billion, eight hundred sixty million, six hundred sixty-two thousand, one hundred ninety-three".